For the circuit of Fig. 30.17, let C = 15.0 nF, L = 22 mH, and R = 75.0 Ω. (a) Calculate...

For the circuit of Fig. 30.17, let C = 15.0 nF, L = 22 mH, and R = 75.0 Ω. (a) Calculate the oscillation frequency of the circuit once the capacitor has been charged and the switch has been connected to point a. (b) How long will it take for the amplitude of the oscillation to decay to 10.0, of its original value? (c) What value of R would result in a critically damped circuit?